I am alarmed to discover that, according an item on the BBC news, "Windscreen wiper water could be the cause of as many as 20% of cases of Legionnaires' disease in the UK."
Since this is the only way my car ever gets washed, what am I going to do now?
As a PS to this, have you noticed how if you wash your car, the dirt shows up within a couple of days, but if you then don't wash it at all, it doesn't go on getting more and more and more dirty? There is a point at which no more dirt will stick to your car. At that point, it effectively becomes self-cleaning.
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